[LU-16179] race in ll_splice_alias() may lead to two valid dentries for the same file

• Type: Bug
• Resolution: Duplicate
• Priority: Minor
• Severity: 3
• Assignee: Lai Siyao
• Reporter: Lai Siyao

Description

ll_splice_alias() calls ll_find_alias() before calling d_add(), but if there are concurrent lookups, both may not find alias dentry, and add dentry, therefore there may be more than one valid dentries for the same file, which may cause deadlock in rename().

Issue Links

• duplicates: LU-9868 dcache/namei fixes for lustre

Comments

[Peter Jones]

Fixed already by https://review.whamcloud.com/#/c/fs/lustre-release/+/28486/

[Gerrit Updater]

"Lai Siyao <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/48624
Subject: LU-16179 llite: race in ll_splice_alias()
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 3c02182bd0eaab291c400c66a295396943cf3c90